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How to mock an Akka Actor to Unit Test a class?

I have a Controller class which controls the requests sent to a Akka actor which is injected in to the controller.

Controller's code:

class Controller(actor: ActorRef) {
  def control(msg: String): Future[String] = {
    actor.ask(msg)(Timeout(2 seconds)).mapTo[String]
  }
}

And my Actor's code is:

class ActorA extends Actor {
  override def receive: Receive = {
    case msg: String => sender ! msg
    case msg: Int => sender ! msg.toString
    case _ => "Invalid command!"
}

Now I need to mock ActorA's behaviour to unit test Controller. Is there a way to do so via Akka TestKit ?

like image 758
himanshuIIITian Avatar asked Dec 14 '15 10:12

himanshuIIITian


1 Answers

Use a TestProbe. From the testing documentation:

val probe = TestProbe()
val future = probe.ref ? "hello"
probe.expectMsg(0 millis, "hello") 
probe.reply("world")
assert(future.isCompleted && future.value == Some(Success("world")))
like image 144
Ramón J Romero y Vigil Avatar answered Oct 23 '22 10:10

Ramón J Romero y Vigil